msleep() in interrupt handler?

[Woody Wu]

On Thursday, August 20, 2015, Jeff Haran <Jeff.Haran at citrix.com> wrote:

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> *From:* kernelnewbies-bounces at kernelnewbies.org
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> *On Behalf Of *Woody Wu
> *Sent:* Wednesday, August 19, 2015 4:47 PM
> *To:* kernelnewbies
> *Subject:* msleep() in interrupt handler?
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> Hi List,
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> What will happen if call msleep() in an interrupt handler? I knew the
> msleep() will cause the calling process to sleep, but in the context of
> interruption, there is no process, so I am wondering what is getting
> 'sleep' in this situation.
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> -woody
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> --
> Sent from Gmail Mobile
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> If you are lucky you’ll get a message along the lines of “scheduling while
> atomic” on your console to let you know you’ve blown it. At least that’s
> what I’ve seen when I’ve blown it like that. 8^)
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> Jeff Haran
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I did not see the message.  Actually my interrupt handler is calling
i2c_transfer which in turn used msleep() somewhere in its code.  Is this
normal or dangerous?



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Sent from Gmail Mobile
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